Question

Which of the following points lies on the circle whose center is at the origin and whose radius is 5?

(1,-2)?

Answer 1

For center at origin the equation of circle simply becomes:

\[\large x^2 + y^2 = r^2\]

Or:

\[\large x^2 + y^2 = 25\]

Now for values of x and y you are getting 25 ??

Answer 2

\[(\sqrt{5},\sqrt{5})\]

Answer 3

\[(\sqrt{5})^2 + (\sqrt{5})^2 = 5 + 5 = 10 \ne 25\]

Answer 4

hmm (-3,4).

Answer 5

Yes....

Answer 6

Are you in a test or quiz @helpme9283

Answer 7

no, i'm studying my own with this math problem books